如何自動化給定的SQL查詢

Question

我有一個更新查詢，如下所示。誰能告訴我如何自動執行此，請

1)I have to execute First part. 
2)Then comment line "AND s.ExtractYear = l.ExtractYear"... 
3)Uncomment "--and l.ExtractYear = 2011" and "--WHERE s.Prod IS NULL", then execute. 
4)Uncomment "--and l.ExtractYear = 2010" and "--WHERE s.Prod IS NULL", then execute. 
5)Uncomment "--and l.ExtractYear = 2009" and "--WHERE s.Prod IS NULL", then execute. 
6)Uncomment "--and l.ExtractYear = 2008" and "--WHERE s.Prod IS NULL", then execute. 
7)Uncomment "--and l.ExtractYear = 2007" and "--WHERE s.Prod IS NULL", then execute. 

--First part 
UPDATE s 
Set Col1 = value 
FROM table1 s 
INNER JOIN LkpTable l 
ON 
s.PId= l.PId 
AND s.ExtractYear = l.ExtractYear 


--Second part 
--and l.ExtractYear = 2011 
--and l.ExtractYear = 2010 
--and l.ExtractYear = 2009 
--and l.ExtractYear = 2008 
--and l.ExtractYear = 2007 
--WHERE s.Prod IS NULL 

Answer 1

對於第二部分，你可以很容易地通過編碼這些年的循環週期，以從2007年開始到今年這會自動執行部分。

您可能不希望第二步自動化第一步，因爲這只是要求問題，因爲他們正在做兩件完全不同的事情。

Answer 2

這是我最好的客人，沒有表結構和一些示例數據來測試。你正在測試這個查詢的地方，對吧？ :)

UPDATE s 
    SET Col1 = value 
FROM 
    table1 s 
     INNER JOIN 
    LkpTable l 
     ON 
     s.PId= l.PId 
      AND 
     (s.ExtractYear = l.ExtractYear 
      OR 
     (l.ExtractYear IN (2007, 2008, 2009, 2010, 2011) 
      AND 
      s.Prod IS NULL)) 

Answer 3

試試這個：

-- Will use EXECUTE statement as 
-- 'Execute a character string' 
DECLARE @cmdUpdate VARCHAR(200) 
DECLARE @iYear INT 
DECLARE @cYear VARCHAR(5) 

SET @cmdUpdate = 'UPDATE s 
        Set Col1 = value 
        FROM table1 s 
        INNER JOIN LkpTable l 
        ON 
        s.PId= l.PId' 

SET @iYear = 2012 
WHILE @iYear >= 2007 
BEGIN 
    SET @cYear = CONVERT(VARCHAR(5), @iYear) 
    IF @iYear > 2011 
    -- Executing the first part (@iYear = 2012) 
    EXECUTE (@cmdUpdate + ' AND s.ExtractYear = l.ExtractYear') 
    ELSE 
    -- Executing all other parts consecutively 
    EXECUTE (@cmdUpdate + ' and l.ExtractYear = ' + @cYear + ' WHERE s.Prod IS NULL') 
    SET @iYear = @iYear - 1 
END